JP2842007B2 - Hot water mixing control device - Google Patents
Hot water mixing control deviceInfo
- Publication number
- JP2842007B2 JP2842007B2 JP2489892A JP2489892A JP2842007B2 JP 2842007 B2 JP2842007 B2 JP 2842007B2 JP 2489892 A JP2489892 A JP 2489892A JP 2489892 A JP2489892 A JP 2489892A JP 2842007 B2 JP2842007 B2 JP 2842007B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- water
- hot water
- water temperature
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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- Control Of Temperature (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は湯と水の混合比率を調整
し最適な混合湯温を得る湯水混合制御装置に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot and cold water mixing control apparatus for adjusting a mixing ratio of hot water and water to obtain an optimum mixed hot water temperature.
【０００２】[0002]
【従来の技術】従来この種の湯水混合装置は図９に示す
ようなものがあった。（例えば、特開平１−３１２２７
９号公報）図９において、１は湯流路、２は水流路であ
り、各流路に関連して自動調圧弁３が設けられている。
自動調圧弁３は、湯流路１の１次圧力ＰＨ１を減圧する
湯側弁体４、湯側弁座５と、水流路２の１次圧力ＰＣ１
を減圧する水側弁体６、水側弁座７と、湯側弁体４と水
側弁体６を連結する弁軸８と、湯と水の減圧後の１次圧
ＰＨ１，ＰＣ１の圧力差で動作するピストン９とで構成
されておる。そして、湯または水の圧力が急変してもそ
の圧力で自動調圧弁３が移動し、湯と水の２次圧ＰＨ２
とＰＣ２とが常に等しく保たれるように作用する。さら
に弁軸８にバイアス手段１０が設けられ、バイアス手段
１０は弁軸８の端部に結合され、ボビン１１とそのボビ
ン１１上に巻回され絶縁されたコイル１２およびコイル
１２をはさむように設けられた永久磁石１３を有し、前
記コイル１２は可撓部１４を介して制御手段１８に接続
されている。2. Description of the Related Art Conventionally, there has been a water / water mixing apparatus of this kind as shown in FIG. (For example, see JP-A-1-31227.
No. 9) In FIG. 9, 1 is a hot water flow path, 2 is a water flow path, and an automatic pressure regulating valve 3 is provided in connection with each flow path.
The automatic pressure regulating valve 3 includes a hot water side valve element 4 for reducing the primary pressure PH1 of the hot water flow path 1, a hot water side valve seat 5, and a primary pressure PC 1 of the water flow path 2.
Valve body 6, water-side valve seat 7, valve shaft 8 connecting hot-water valve body 4 and water-side valve body 6, and primary pressure PH1, PC1 after decompression of hot water and water. And a piston 9 that operates with a difference. And even if the pressure of hot water or water changes suddenly, the automatic pressure regulating valve 3 moves at that pressure, and the secondary pressure PH2 of hot water and water is changed.
And PC2 always keep the same. Further, a bias means 10 is provided on the valve shaft 8, and the bias means 10 is connected to an end of the valve shaft 8, and is provided so as to sandwich the bobbin 11 and the coil 12 wound and insulated on the bobbin 11. The coil 12 is connected to a control means 18 via a flexible portion 14.
【０００３】制御手段１８からコイル１２に電流を流す
と、その電流は永久磁石１３によって発生している磁界
を横切るのでフレミングの法則によって弁軸８にバイア
ス力が付与される。このためバイアス力の分だけ自動調
圧点がずれ、例えば湯と水の２次圧ＰＨ２とＰＣ２とが
２：１の点で常に調圧されるようになり、結果的に出湯
温度が高くなる。このようにコイル１２への電流を変化
することにより混合湯温を変える。制御手段１８はコイ
ル１２に電流を流す際に微小交流信号を重畳している。
これはバイアス手段１０の磁気回路のヒステリシス特性
や駆動開始時の摺動抵抗を軽減するためである。１９は
湯と水の混合部であり、混合後は流量調節開閉弁２０を
介して出湯されるが、その温度は混合湯温検出手段（例
えばサーミスタ）１５によって、またその流量は流量検
出手段１６によって検出され、設定手段１７の値に一致
させるべく制御手段１８がバイアス手段１０と流量調節
開閉駆動手段２１を付勢し温度調節を行なう。When a current flows from the control means 18 to the coil 12, the current crosses the magnetic field generated by the permanent magnet 13, so that a bias force is applied to the valve shaft 8 by Fleming's law. For this reason, the automatic pressure adjustment point is shifted by the amount of the bias force. For example, the secondary pressure PH2 and the PC2 of hot water and water are constantly adjusted at a point of 2: 1. As a result, the tapping temperature becomes high. . Thus, the temperature of the mixed hot water is changed by changing the current to the coil 12. The control means 18 superimposes a minute AC signal when a current flows through the coil 12.
This is to reduce the hysteresis characteristics of the magnetic circuit of the bias means 10 and the sliding resistance at the start of driving. Reference numeral 19 denotes a mixing section of hot water and water. After mixing, the hot water is discharged through a flow rate control opening / closing valve 20. The control means 18 biases the bias means 10 and the flow rate control opening / closing drive means 21 to adjust the temperature so as to match the value of the setting means 17.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら上記のよ
うな構成では、水温が高い場合、水温に近い温度の混合
湯を出湯しようとすると自動調圧弁３は湯量を絞ろうと
する。この場合は自動調圧弁３の感度は高くなり少しだ
け動作しても混合湯温は大きく変化し通常のゲインでは
ハンチングを発生してしまう。However, in the above configuration, when the water temperature is high, the automatic pressure regulating valve 3 attempts to reduce the amount of hot water when the mixed water having a temperature close to the water temperature is to be discharged. In this case, the sensitivity of the automatic pressure regulating valve 3 is increased, and even if the valve is slightly operated, the temperature of the mixed hot water greatly changes, and hunting occurs at a normal gain.
【０００５】さらに、出湯温度が水温に近い場合に流量
を絞ると設定温度を維持するために湯側弁体４を湯側弁
座５がほとんど閉じてしまい、これがきっかけでハンチ
ングを開始してしまうことがある。Further, when the flow rate is reduced when the tapping temperature is close to the tapping temperature, the tapping valve 4 is almost closed by the tapping valve 5 to maintain the set temperature, which causes hunting to start. Sometimes.
【０００６】本発明はかかる従来の課題を解消するもの
で水温を水温検出手段により検出死出湯温度が水温に近
い場合は混合弁制御手段のゲインを小さくするよう変化
させて混合弁動作の安定を図ることを第１の目的とす
る。The present invention solves the above-mentioned conventional problem. The water temperature is detected by the water temperature detecting means. When the temperature of the hot water is close to the water temperature, the gain of the mixing valve control means is changed to be small to stabilize the operation of the mixing valve. The first purpose is to achieve this.
【０００７】本発明の第２の目的は水温と流量を検出し
出湯温度が水温に近くさらに流量が少ない場合には混合
弁制御手段のゲインを小さくするよう変化させて混合弁
動作の安定を図ることである。A second object of the present invention is to detect the water temperature and the flow rate, and when the tapping temperature is close to the water temperature and the flow rate is smaller, the gain of the mixing valve control means is changed to be small so as to stabilize the operation of the mixing valve. That is.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するため
に本発明の湯水混合制御装置は、湯流路および水流路
と、前記湯流路および前記水流路の流量を調節する混合
弁と、前記混合弁を駆動する混合弁駆動手段と、混合湯
温を検出する混合湯温検出手段と、混合湯温を設定する
設定手段と、前記水流路の水温を検出する水温検出手段
と、前記混合弁駆動手段に駆動信号を出力する制御手段
とからなり、前記制御手段は前記混合湯温検出手段の信
号と前記設定手段の信号の偏差より前記混合弁駆動手段
の駆動量を設定し、その駆動量は前記水温検出手段で得
られた水温に応じた係数を乗じて調節する混合弁制御手
段を有する構成としたものである。According to the present invention, there is provided a hot and cold water mixing control apparatus comprising: a hot water flow path and a water flow path; a mixing valve for adjusting flow rates of the hot water flow path and the water flow path; a mixing valve driving means for driving the mixing valve, mixing the hot water
Mixed water temperature detection means for detecting the temperature and setting the mixed water temperature
A setting unit, a temperature detecting means for detecting the water temperature of the water flow path consists of a control means for outputting a drive signal to the mixing valve driving means, said control means signals of the mixed hot water temperature detecting means
Signal from the signal of the setting means and the mixing valve driving means.
Is set by the water temperature detecting means.
And a mixing valve control means for adjusting by multiplying by a coefficient corresponding to the obtained water temperature .
【０００９】また第２の目的を達成するために本発明の
湯水混合制御装置は、混合流量を検出する流量検出手段
を有し、混合弁駆動手段の駆動量は水温検出手段で得ら
れた水温に応じた係数と前記流量検出手段で選られた流
量に応じた係数を乗じて調節する構成としたものであ
る。In order to achieve the second object, a hot water mixing control device according to the present invention comprises a flow rate detecting means for detecting a mixing flow rate.
The driving amount of the mixing valve driving means is obtained by the water temperature detecting means.
And a flow rate selected by the flow rate detecting means.
It is configured to be adjusted by multiplying by a coefficient according to the amount .
【００１０】[0010]
【作用】本発明は、上記した構成により、出湯温度が水
温に近い場合は混合弁制御手段のゲインを落としてハン
チング等の発生を防ぎ混合弁の安定性をはかる。According to the present invention, when the hot water temperature is close to the water temperature, the gain of the mixing valve control means is reduced to prevent the occurrence of hunting or the like, thereby ensuring the stability of the mixing valve.
【００１１】さらに、出湯温度が水温に近くかつ流量が
少ない場合は水温と流量に応じて混合弁制御手段の駆動
量を変化して混合弁の安定を図り出湯温度の大幅な温度
変動を防ぐものである。Further, when the tapping temperature is close to the water temperature and the flow rate is small, the driving amount of the mixing valve control means is changed in accordance with the water temperature and the flow rate to stabilize the mixing valve and prevent a large temperature fluctuation of the tapping temperature. It is.
【００１２】[0012]
【実施例】以下、本発明の一実施例を図面を用いて説明
する。図１は湯水混合制御装置の断面図で、従来例の図
９と同一部分には同一符号を付して詳細な説明を省略し
ている。２２は付勢手段で、自動調圧弁３と付勢手段２
２で混合弁２３を形成する。２４は前記付勢手段２２の
力と対向して可変バイアス力を混合弁２３に付与する混
合弁駆動手段である。混合弁駆動手段２４は、磁性体か
らなる第１のプランジャ２５と、前記第１のプランジャ
２５の周りに防水および絶縁された第１のコイル２６を
有し、前記第１のコイル２６は制御手段１８に接続され
ている。混合湯温は混合湯温検出手段１５によって検出
する。水温は水流路２に設けた水温検出手段４０で検出
する。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a hot and cold water mixing control device, and the same parts as those of FIG. Reference numeral 22 denotes an urging means, which includes the automatic pressure regulating valve 3 and the urging means 2.
2, the mixing valve 23 is formed. Numeral 24 denotes a mixing valve driving means for applying a variable bias force to the mixing valve 23 in opposition to the force of the urging means 22. The mixing valve driving means 24 has a first plunger 25 made of a magnetic material, and a first coil 26 which is waterproof and insulated around the first plunger 25, and the first coil 26 is a control means. 18. The mixed hot water temperature is detected by the mixed hot water temperature detecting means 15. The water temperature is detected by a water temperature detecting means 40 provided in the water channel 2.
【００１３】混合湯の流量は混合部１９より下流におい
て流量調節開閉弁２０により調節する。流量調節開閉弁
２０は弁きょう体２７と、この弁きょう体内に流量を調
節する円錐状の流量制御弁体２８とそれに対応する弁座
２９を設けている。流量制御弁体２８と流体の１次圧
（混合不９の圧力）とバランスをとるため、可撓性受圧
体としての溝付ダイヤフラム３０を流量制御弁体２８と
弁きょう体２７の間に連結しており、さらに溝３０ａを
深くして、流量制御弁体２８のリフト量にかかわらず、
有効受圧面積が前記弁座２９の口径と常に等しくなるよ
うに構成している。ダイヤフラム３０で１次側と完全に
仕切られた背圧室３１と前記流量制御弁体２８の２次側
とは、連通孔３２により連通している。流量制御弁体２
８は、付勢手段としてのスプリング３４により、弁座２
９に当接する方向に付勢されている。また、第２のコイ
ル３５と、一方の端面を密閉したパイプ３６があり、第
２のコイル３５への通電量により駆動される第２のプラ
ンジャ３７がパイプ３６内を摺動する。第２のプランジ
ャ３７はシャフト３８を介して流量制御弁体２８と連動
する構成となっている。第２のコイル３５、パイプ３６
および第２のプランジャ３７で流量調節開閉弁駆動手段
２１を形成している。The flow rate of the mixed hot water is adjusted downstream of the mixing section 19 by a flow control on-off valve 20. The flow rate control on-off valve 20 is provided with a valve housing 27, a conical flow control valve body 28 for adjusting the flow rate in the valve housing, and a corresponding valve seat 29. A grooved diaphragm 30 as a flexible pressure receiver is connected between the flow control valve body 28 and the valve housing 27 in order to balance the flow control valve body 28 with the primary pressure of the fluid (pressure at which mixing is not possible 9). The depth of the groove 30a is further increased, and regardless of the lift amount of the flow control valve body 28,
The effective pressure receiving area is configured to be always equal to the diameter of the valve seat 29. The back pressure chamber 31 completely separated from the primary side by the diaphragm 30 and the secondary side of the flow control valve body 28 communicate with each other through a communication hole 32. Flow control valve element 2
8 is a valve seat 2 provided with a spring 34 as an urging means.
9 is urged in a direction to come into contact therewith. Further, there is a second coil 35 and a pipe 36 having one end face sealed. A second plunger 37 driven by the amount of electricity supplied to the second coil 35 slides in the pipe 36. The second plunger 37 is configured to interlock with the flow control valve body 28 via a shaft 38. Second coil 35, pipe 36
The second plunger 37 forms the flow control on-off valve driving means 21.
【００１４】上記構成において、制御手段１８は第２の
コイル３５への通電量を制御することにより流量を調節
するもので、流量を零（停止）にするには、制御手段１
８は第２のコイル３５への通電を切ることで、スプリン
グ３４により付勢された流量制御弁体２８は弁座２９に
当接し、流体は流れなくなる。第２のコイル３５に通電
すると、第２のプランジャ３７を吸引あるいは押しだ
し、スプリング３４の付勢力に対抗して、流量制御弁体
２８をリフトさせ、流体（混合湯）が流れ始める。つま
り、制御手段１８は第２のコイル３５への通電量を変え
ることにより、流量制御弁体２８を任意のリフト量に調
節し、流量を制御するものである。In the above arrangement, the control means 18 adjusts the flow rate by controlling the amount of current supplied to the second coil 35. To reduce the flow rate to zero (stop), the control means 18 controls the flow rate.
In 8, when the power supply to the second coil 35 is cut off, the flow control valve body 28 urged by the spring 34 comes into contact with the valve seat 29, and the fluid stops flowing. When the second coil 35 is energized, the second plunger 37 is sucked or pushed out, the flow control valve body 28 is lifted against the urging force of the spring 34, and the fluid (mixed hot water) starts flowing. That is, the control means 18 adjusts the flow control valve body 28 to an arbitrary lift amount by changing the amount of current supplied to the second coil 35 to control the flow amount.
【００１５】図２は制御手段１８の例である。４１は混
合湯温検出手段１５と設定手段１７の信号と水温検出手
段４０の信号を入力し混合弁２３の駆動量を演算する混
合弁制御手段、４２は前記混合弁制御手段４１の信号に
より混合弁駆動手段（第１のコイル）２６の駆動量を設
定する第１の駆動量設定手段、４３は設定手段１７の信
号を入力し流量調節開閉弁２０の駆動量を演算する流量
調節開閉弁制御手段、４４は前記流量調節開閉弁制御手
段４３の信号により流量調節開閉弁駆動手段２１の駆動
量を設定する第２の駆動量設定手段である。FIG. 2 shows an example of the control means 18. 41 is a mixing valve control means for inputting a signal of the mixed hot water temperature detecting means 15 and the setting means 17 and a signal of the water temperature detecting means 40 to calculate a driving amount of the mixing valve 23, and 42 is a mixing valve based on a signal of the mixing valve control means 41. A first drive amount setting means 43 for setting a drive amount of the valve drive means (first coil) 26 is a flow control valve control for inputting a signal of the setting means 17 and calculating a drive amount of the flow control valve 20. The means 44 is a second drive amount setting means for setting the drive amount of the flow control on / off valve drive means 21 based on the signal of the flow control on / off valve control means 43.
【００１６】次に本発明の構成の動作を説明する。温度
調節を行なう場合、制御手段１８から第１のコイル２６
に電流を流すと、磁性体からなる第１のプランジャ２５
はフレミングの法則により弁軸８にバイアス力を付与す
る。このバイアス力と付勢手段２２の付勢力がつりあっ
たところで自動調圧弁３はバランスする。したがって、
第１のコイル２６に流す電流を変化することにより自動
調圧弁３のバランス点を移動することができる。例え
ば、電流の小さい場合は付勢手段２２の力の方が強いた
め湯側弁体４より水側弁体６の方が大きく開き、出湯温
度が低くなる。電流を大きくすると付勢手段２２の力に
対向してプランジャ２５を押し出すことにより湯側弁体
４が開きだし結果的に出湯温度が高くなる。Next, the operation of the configuration of the present invention will be described. When performing temperature control, the control unit 18 sends the first coil 26
When a current flows through the first plunger 25 made of a magnetic material,
Applies a biasing force to the valve shaft 8 according to Fleming's law. When the bias force and the urging force of the urging means 22 are balanced, the automatic pressure regulating valve 3 is balanced. Therefore,
By changing the current flowing through the first coil 26, the balance point of the automatic pressure regulating valve 3 can be moved. For example, when the current is small, the force of the urging means 22 is stronger, so that the water-side valve body 6 opens more widely than the hot-water-side valve body 4, and the tapping temperature decreases. When the current is increased, the plunger 25 is pushed out against the force of the urging means 22, whereby the hot-water-side valve body 4 is opened, and as a result, the hot-water temperature rises.
【００１７】このようにして、制御手段１８は混合湯温
検出手段１５の信号と設定手段１７の信号を入力するこ
とにより、出湯温度が設定温度になるように混合弁制御
手段４１，第１の駆動量設定手段４２により第１のコイ
ル２６に流す電流を可変し混合弁２３を調節する。In this way, the control means 18 inputs the signal of the mixed hot water temperature detecting means 15 and the signal of the setting means 17 so that the mixing valve control means 41 and the first control means 41 control the mixing hot water temperature to the set temperature. The amount of current flowing through the first coil 26 is varied by the drive amount setting means 42 to adjust the mixing valve 23.
【００１８】通常の出湯を行っている場合は以上のよう
な方法で問題は生じないが、出湯温度が供給される水温
に近い場合は混合する湯量が少なく、その量を維持する
のが困難でよくハンチングを生じてしまった。In the case of ordinary tapping, no problem occurs with the above method, but when the tapping temperature is close to the supplied water temperature, the amount of hot water to be mixed is small and it is difficult to maintain the amount. Hunting often occurred.
【００１９】そこで本発明は上記の現象を防ぐために次
のような手段を講じている。通常の出湯時においてはあ
らかじめ設定された温度（もしくは設定手段１７により
設定した温度：以下設定温度Ｔｓとする）に混合湯温検
出手段１５により検出した温度が一致するように混合弁
制御手段４１は駆動量を設定して第１の駆動量設定手段
４２を介して第１のコイル２６を流れる電流を調節して
いる。Therefore, the present invention takes the following measures to prevent the above phenomenon. At the time of normal tapping, the mixing valve control means 41 is controlled so that the temperature detected by the mixed hot water temperature detecting means 15 coincides with a preset temperature (or a temperature set by the setting means 17; hereinafter, referred to as a set temperature Ts). The drive amount is set to adjust the current flowing through the first coil 26 via the first drive amount setting means 42.
【００２０】ここで出湯温度が供給水温に近い場合にＴ
ｓが変更された時の制御動作を図３のフローチャートと
図４の出力特性図を用いて説明する。図３においてステ
ップ１００の温度制御ではまず、水温検出手段４０によ
り供給される水温Ｔｃをステップ１０１で検出する。つ
ぎに設定温度と混合湯温検出手段１５の信号の差を求め
てこれを偏差Ｅ（ステップ１０２）とする。水温Ｔｃを
変数として駆動量の係数ｇ（Ｔｃ）をステップ１０３で
演算する。また偏差Ｅを用いて制御量ｆ（Ｅ）をステッ
プ１０４で演算する。ここでｆ（Ｅ）はよく知られてい
るＰＩＤ制御やファジィ制御等どれを用いてもよく制御
則の種類は固定しない。そして制御量ｆ（Ｅ）をステッ
プ１０５で係数ｇ（Ｔｃ）倍し、これを用いて第１の駆
動量設定手段４０に信号を出し第１のコイル２６に流す
電流を設定し駆動を行なう。この温度制御は一定のサン
プリング周期で繰り返し行なっている。Here, when the tapping temperature is close to the supply water temperature, T
The control operation when s is changed will be described with reference to the flowchart of FIG. 3 and the output characteristic diagram of FIG. In the temperature control of step 100 in FIG. 3, first, the water temperature Tc supplied by the water temperature detecting means 40 is detected in step 101. Next, a difference between the set temperature and the signal of the mixed hot water temperature detecting means 15 is obtained, and this difference is set as a deviation E (step 102). In step 103, a coefficient g (Tc) of the driving amount is calculated using the water temperature Tc as a variable. Further, the control amount f (E) is calculated in step 104 using the deviation E. Here, f (E) may use any of well-known PID control and fuzzy control, and the type of control law is not fixed. Then, the control amount f (E) is multiplied by a coefficient g (Tc) in step 105, and a signal is sent to the first drive amount setting means 40 using this to set a current flowing through the first coil 26 to drive. This temperature control is repeatedly performed at a constant sampling cycle.
【００２１】図４において、制御量を求める際にｇ（Ｔ
ｃ）を用いない場合は時刻ｔ１においてＴｓが４２℃か
ら３５℃に変更された時、供給水温が３５℃より十分低
いと出湯温度が３５℃になっても供給湯量はたくさん必
要であるため湯側弁体４と湯側弁座５はある程度開いて
混合弁の感度としてはあまり高くない。したがってハン
チングも生じることなく安定に温度変更が可能である
（出湯温度Ａ特性）。Referring to FIG. 4, g (T
If c) is not used, when Ts is changed from 42 ° C. to 35 ° C. at time t1, if the supply water temperature is sufficiently lower than 35 ° C., a large amount of hot water is required even if the tapping water temperature becomes 35 ° C. The side valve body 4 and the hot water side valve seat 5 are opened to some extent, and the sensitivity of the mixing valve is not so high. Therefore, the temperature can be stably changed without hunting (the tapping temperature A characteristic).
【００２２】しかし夏場のように供給水温が３５℃に近
いと出湯温度が３５℃で供給湯量はほとんど必要ないた
め湯側弁体４と湯側弁座５の間は非常に狭くなり混合弁
の感度は高くなっている。したがって出湯温度が３５℃
近くになってくると制御が困難になりハンチングを生じ
てしまうことがある（出湯温度Ｂ特性）。However, when the supply water temperature is close to 35.degree. C., as in summer, the supply temperature is 35.degree. C. and the amount of supplied hot water is scarcely required. Sensitivity is high. Therefore, the tap water temperature is 35 ° C
When it gets closer, control becomes difficult and hunting may occur (the tapping temperature B characteristic).
【００２３】制御量を求める際にｇ（Ｔｃ）を用いると
時刻ｔ１においてＴｓが４２℃から３５℃に変更された
時、供給水温により制御量ｆ（Ｅ）を係数ｇ（Ｔｃ）倍
するため混合弁を安定して制御し温度変更が可能であ
る。（出湯温度Ｃ特性）具体的には図５のようにステッ
プ１０３で求める係数ｇ（Ｔｃ）は水温が低い場合に１
とし、水温が高くなるにしたがって小さい値となるよう
にする。この操作により図４の出湯温度Ｃ特性Ｔ２のよ
うに出湯温度が３５℃になるまでの時間が係数を小さく
した分遅くなるが安定した出湯温度特性を維持すること
が可能となる。When g (Tc) is used to obtain the control amount, when Ts is changed from 42 ° C. to 35 ° C. at time t1, the control amount f (E) is multiplied by a factor g (Tc) depending on the supply water temperature. The mixing valve can be controlled stably to change the temperature. (Discharge Temperature C Characteristics) Specifically, as shown in FIG. 5, the coefficient g (Tc) obtained in step 103 is 1 when the water temperature is low.
And the value becomes smaller as the water temperature increases. This operation makes it possible to maintain a stable tapping temperature characteristic although the time required for the tapping temperature to reach 35 ° C. is reduced by reducing the coefficient as in the tapping temperature C characteristic T2 in FIG.
【００２４】本実施例では水温を検出するために水流路
２に水温検出手段４０を設置しているが出湯直後は湯流
路１内の温度もほとんど水温に近いため混合湯温検出手
段１５を用い出湯直後の混合湯温を水温として制御して
もよい。そうすると水温検出手段４０を無くすことがで
きる。この場合、温度制御のフローチャートにおいてス
テップ１０１の水温を求めるのを出湯開始時１回だけ行
えばよい。In the present embodiment, the water temperature detecting means 40 is provided in the water flow path 2 for detecting the water temperature. However, immediately after the tapping, the temperature in the hot water flow path 1 is almost close to the water temperature, so that the mixed hot water temperature detecting means 15 is provided. The temperature of the mixed hot water immediately after tapping may be controlled as the water temperature. Then, the water temperature detecting means 40 can be eliminated. In this case, in the temperature control flowchart, the water temperature in step 101 may be obtained only once at the start of hot water supply.
【００２５】また本発明の他の実施例について図６、図
７、図８にしたがい説明する。なお、上記の実施例にお
ける図３のフローチャートと同一部分には同一符号を付
して詳細な説明を省略し異なる部分を中心に説明する。Another embodiment of the present invention will be described with reference to FIGS. 6, 7, and 8. FIG. The same parts as those in the flowchart of FIG. 3 in the above embodiment are denoted by the same reference numerals, detailed description is omitted, and different parts will be mainly described.
【００２６】混合湯の流量が少なく、さらに供給水温が
高い場合は混合弁の感度は上記実施例より高くなってい
る。そこでこのような場合に安定して混合湯を得るため
の手段を流量を変更した時を例にとり説明する。図６に
おいてステップ１００の温度制御ではまず、水温検出手
段４０により供給される水温Ｔｃをステップ１０１で検
出する。次に設定温度と混合湯温検出手段１５の信号の
差を求めてこれを偏差Ｅ（ステップ１０１）とする。さ
らに流量Ｑをステップ１０６で求める。本実施例で用い
ている流量調節開閉弁２０は第２のコイル３５に流す電
流によって流量が決まるため、流量調節開閉弁制御手段
４３の信号により流量を換算している。そして、水温Ｔ
ｃを変数とした駆動量の係数ｇ（Ｔｃ）をステップ１０
３で、流量Ｑを変数とした駆動量の係数ｈ（Ｑ）をステ
ップ１０７で演算する。また、偏差Ｅを用いて制御量ｆ
（Ｅ）をステップ１０４で演算する。そして制御量ｆ
（Ｅ）をステップ１０５で係数ｇ（Ｔｃ）とｈ（Ｑ）を
乗算し、これを用いて第１の駆動量設定手段４２に信号
を出し第１のコイル２６に流す電流を設定し駆動を行な
う。この温度制御は一定のサンプリング周期で繰り返し
行なっている。When the flow rate of the mixed hot water is small and the supply water temperature is high, the sensitivity of the mixing valve is higher than that of the above embodiment. Therefore, in such a case, the means for stably obtaining the mixed hot water will be described with an example in which the flow rate is changed. In the temperature control of step 100 in FIG. 6, first, the water temperature Tc supplied by the water temperature detecting means 40 is detected in step 101. Next, a difference between the set temperature and the signal of the mixed hot water temperature detecting means 15 is obtained, and this difference is set as a deviation E (step 101). Further, a flow rate Q is obtained in step 106. Since the flow rate of the flow control on-off valve 20 used in this embodiment is determined by the current flowing through the second coil 35, the flow rate is converted by a signal from the flow control on-off valve control means 43. And the water temperature T
The coefficient g (Tc) of the driving amount with c as a variable is calculated in step 10
In step 3, a coefficient h (Q) of the driving amount with the flow rate Q as a variable is calculated in step 107. Further, the control amount f is calculated using the deviation E.
(E) is calculated in step 104. And the control amount f
(E) is multiplied by a coefficient g (Tc) and h (Q) in step 105, and a signal is sent to the first drive amount setting means 42 to set a current flowing through the first coil 26 by using the multiplied value. Do. This temperature control is repeatedly performed at a constant sampling cycle.
【００２７】図７において、制御量を求める際に係数ｇ
（Ｔｃ）やｈ（Ｑ）を用いない場合は時刻ｔ１において
流量がＱ１からＱ２に変更された時、供給水温が十分低
く出湯流量も混合弁２３の性能に影響しないほどあると
出湯流量がＱ２になっても湯側弁体４と湯側弁座５はあ
る程度開いて混合弁の感度としてはあまり高くない。し
たがってハンチングも生じることなく安定に温度変更が
可能である（出湯温度Ｄ特性）。In FIG. 7, a coefficient g is used for obtaining the control amount.
When (Tc) and h (Q) are not used, when the flow rate is changed from Q1 to Q2 at the time t1, if the supply water temperature is sufficiently low and the flow rate of the hot water is so large that it does not affect the performance of the mixing valve 23, the flow rate of the hot water is Q2. However, the hot water side valve element 4 and the hot water side valve seat 5 are opened to some extent, and the sensitivity of the mixing valve is not so high. Therefore, the temperature can be stably changed without hunting (the tapping temperature D characteristic).
【００２８】しかし夏場のように供給水温が高く、かつ
出湯流量が混合弁２３の性能に影響するほど少なくする
と湯側弁体４と湯側弁座５の間は非常に狭くなり混合弁
の感度は高くなっている。したがって出湯流量がＱ２近
くになってくると制御が困難になりハンチングを生じて
しまうことがある（出湯温度Ｅ特性）。However, if the supply water temperature is high and the flow rate of the hot water is so small as to affect the performance of the mixing valve 23 as in summer, the space between the hot-water valve body 4 and the hot-water valve seat 5 becomes very narrow, and the sensitivity of the mixing valve is reduced. Is higher. Therefore, when the tapping flow rate approaches Q2, the control becomes difficult and hunting may occur (the tapping temperature E characteristic).
【００２９】制御量を求める際にｇ（Ｔｃ）とｈ（Ｑ）
を用いると時刻ｔ１において流量がＱ１からＱ２に変更
された時、制御量ｆ（Ｅ）を係数ｇ（Ｔｃ）とｈ（Ｑ）
倍するため混合弁を安定して制御し流量変更が可能であ
る（出湯温度Ｆ特性）。具体的には図８のようにステッ
プ１０３で求める係数ｇ（Ｔｃ）は水温が低い場合に１
とし、水温が高くなるにしたがって小さい値となるよう
にする。同様にステップ１０６で求める係数ｈ（Ｑ）は
流量が多い場合に１とし、流量が少なくなるにしたがっ
て小さい値となるようにする。この操作により図７の出
湯温度Ｆ特性、Ｔ４のように温度の過渡変動が安定する
までの時間が係数を小さくした分遅くなるが安定した出
湯温度特性を維持することが可能となる。When obtaining the control amount, g (Tc) and h (Q)
Is used, when the flow rate is changed from Q1 to Q2 at time t1, the control amount f (E) is changed by the coefficients g (Tc) and h (Q).
Therefore, the mixing valve can be controlled stably and the flow rate can be changed (the tapping temperature F characteristic). Specifically, as shown in FIG. 8, the coefficient g (Tc) obtained in step 103 is 1 when the water temperature is low.
And the value becomes smaller as the water temperature increases. Similarly, the coefficient h (Q) obtained in step 106 is set to 1 when the flow rate is large, and becomes smaller as the flow rate decreases. This operation makes it possible to maintain a stable tapping temperature characteristic, although the time until the transient fluctuation of the temperature stabilizes as shown by T4 in FIG.
【００３０】したがって流量や出湯温度を急に変更する
操作を設定手段１７で行なっても安定した混合湯温を得
ることができシャワー等において色々なソフトを付加し
た出湯を快適に行なうことが可能となる。Therefore, even if the operation for suddenly changing the flow rate and the tapping temperature is performed by the setting means 17, a stable mixed tapping temperature can be obtained, and tapping with various software can be performed comfortably in a shower or the like. Become.
【００３１】[0031]
【発明の効果】以上のように本発明の湯水混合制御装置
によれば、混合弁の駆動量を供給水温に応じた係数倍し
て変化することにより、夏場のように水温が出湯温度に
近い場合でも混合弁がハンチングを起こさずに安定した
混合湯温を得ることができる。As described above, according to the hot and cold water mixing control device of the present invention, the driving amount of the mixing valve is multiplied by a coefficient corresponding to the supply water temperature.
By varying Te, it can be temperature as summer obtain stable mixed water temperature without causing mixing valve hunting even when close to the tapping temperature.
【００３２】また、混合弁の駆動量は水温検出手段で得
られた水温に応じた係数と前記流量検出手段で選られた
流量に応じた係数を乗じて調節するため、水温が高く、
かつ流量を絞っても混合弁の駆動量を的確に調節でき、
小流量の温度安定性を保つことができる。 The driving amount of the mixing valve is obtained by the water temperature detecting means.
Selected by the coefficient and the flow rate detecting means according to the water temperature.
To adjust by multiplying the coefficient according to the flow rate, the water temperature is high,
And even if the flow rate is reduced, the driving amount of the mixing valve can be adjusted accurately ,
Temperature stability of small flow rate can be maintained.
【００３３】したがって流量の変更や出湯温度の変更を
ひんぱんに行うシャワー等に用いても不快な温度を感じ
ることが無く、かつ安全な混合湯温の供給を可能とする
ため安心して器具を使用することができる。Therefore, even if it is used for a shower or the like which frequently changes the flow rate and the temperature of the hot water, it does not feel unpleasant temperature, and it is possible to supply the mixed hot water temperature safely, so that the equipment can be used with confidence. be able to.
【図１】本発明の湯水混合制御装置の一実施例を示す断
面図FIG. 1 is a sectional view showing an embodiment of a hot and cold water mixing control device of the present invention.
【図２】同湯水混合制御装置の制御ブロック図FIG. 2 is a control block diagram of the hot and cold water mixing control device.
【図３】同制御ブロックのフローチャートFIG. 3 is a flowchart of the control block.
【図４】本発明装置の出湯時における出力特性図FIG. 4 is an output characteristic diagram at the time of tapping of the apparatus of the present invention.
【図５】本発明の係数ｇ（Ｔｃ）の特性図FIG. 5 is a characteristic diagram of a coefficient g (Tc) of the present invention.
【図６】本発明装置の第２の実施例に制御ブロックのフ
ローチャートFIG. 6 is a flowchart of a control block according to a second embodiment of the present invention;
【図７】本発明装置の第２の実施例の出湯時における出
力特性図FIG. 7 is an output characteristic diagram at the time of tapping in the second embodiment of the apparatus of the present invention.
【図８】（ａ）は本発明装置の第２の実施例の係数ｇ
（Ｔｃ）の特性図 （ｂ）は本発明装置の第２の実施例の係数ｈ（Ｑ）の特
性図FIG. 8A shows a coefficient g of the second embodiment of the apparatus of the present invention.
(B) is a characteristic diagram of the coefficient h (Q) of the second embodiment of the device of the present invention.
【図９】従来の湯水混合制御装置の断面図FIG. 9 is a sectional view of a conventional hot and cold water mixing control device.
【符号の説明】 １ 湯流路 ２ 水流路 ３ 自動調圧弁（混合弁） １７ 設定手段 １８ 制御手段 ２４ 混合弁駆動手段 ４０ 水温検出手段[Description of Signs] 1 hot water flow path 2 water flow path 3 automatic pressure regulating valve (mixing valve) 17 setting means 18 control means 24 mixing valve driving means 40 water temperature detecting means
───────────────────────────────────────────────────── フロントページの続き (72)発明者 城戸内 康夫 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (56)参考文献 特開 平３−28659（ＪＰ，Ａ) 特公 平３−5608（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.6，ＤＢ名) G05D 23/00 - 23/32────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yasuo Kidouchi 1006 Kazuma Kadoma, Kadoma City, Osaka Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-3-28659 (JP, A) -5608 (JP, B2) (58) Fields investigated (Int. Cl. 6 , DB name) G05D 23/00-23/32
Claims (2)
び前記水流路の流量を調節する混合弁と、前記混合弁を
駆動する混合弁駆動手段と、混合湯温を検出する混合湯
温検出手段と、混合湯温を設定する設定手段と、前記水
流路の水温を検出する水温検出手段と、前記混合弁駆動
手段に駆動信号を出力する制御手段とからなり、前記制
御手段は前記混合湯温検出手段の信号と前記設定手段の
信号の偏差より前記混合弁駆動手段の駆動量を設定し、
その駆動量は前記水温検出手段で得られた水温に応じた
係数を乗じて調節する混合弁制御手段を有する湯水混合
制御装置。1. A hot water flow path and a water flow path, a mixing valve for adjusting a flow rate of the hot water flow path and the water flow path, a mixing valve driving means for driving the mixing valve, and a mixed hot water detecting a mixed hot water temperature.
A temperature detecting means, setting means for setting the mixed water temperature, and water temperature detection means for detecting the water temperature of the water flow path consists of a control means for outputting a drive signal to the mixing valve driving means, said control means the The signal of the mixed hot water temperature detecting means and the setting
Set the driving amount of the mixing valve driving means from the deviation of the signal,
The amount of drive depends on the water temperature obtained by the water temperature detection means.
A hot and cold water mixing control device having mixing valve control means for adjusting by multiplying by a coefficient .
し、混合弁駆動手段の駆動量は水温検出手段で得られた
水温に応じた係数と前記流量検出手段で選られた流量に
応じた係数を乗じて調節する構成とした請求項１記載の
湯水混合制御装置。2. A flow rate detecting means for detecting a mixed flow rate.
The driving amount of the mixing valve driving means was obtained by the water temperature detecting means.
The coefficient according to the water temperature and the flow rate selected by the flow rate detection means
The hot water mixing control device according to claim 1, wherein the hot water mixing control device is configured to be adjusted by multiplying by a corresponding coefficient .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2489892A JP2842007B2 (en) | 1992-02-12 | 1992-02-12 | Hot water mixing control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2489892A JP2842007B2 (en) | 1992-02-12 | 1992-02-12 | Hot water mixing control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05224757A JPH05224757A (en) | 1993-09-03 |
| JP2842007B2 true JP2842007B2 (en) | 1998-12-24 |
Family
ID=12151005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2489892A Expired - Fee Related JP2842007B2 (en) | 1992-02-12 | 1992-02-12 | Hot water mixing control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2842007B2 (en) |
-
1992
- 1992-02-12 JP JP2489892A patent/JP2842007B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05224757A (en) | 1993-09-03 |
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